Manual Thermostat

I have one small bedroom with radiant ceiling heat that does not seem to be working. The thermostat is a manual type 240 volt. I am wondering if the thermostat is bad and how I should check it. I have some electrical knowledge and test meters but not sure about testing a manual thermostat. I have not read alot of info about radiant ceiling heat troubleshooting. I am guessing that if the thermostat is not bad that the heating elements are bad and probably would have to go with baseboard heat. Thanks for your time.